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Chemistry Chapter 1
| Question | Answer |
|---|---|
| mixture | a combination of two or more pure substances in which each substance retains its own identity |
| homogeneous | uniform composition, well mixed |
| heterogeneous | nonuniform composition, random placement |
| pure substance | substance that has only one component |
| gas | particles widely spread, no definite shape or value |
| liquid | particles closer together, definite volume but no shape |
| solid | particles very close together, definite volume and shape |
| error | difference between the true value and estimation (random and systematic) |
| accuracy | degree of agreement between the value and measured value |
| precision | measure of the agreement and replica measurements |
| mass | quantity of matter in an object |
| temperature | degree of "hotness" of an object |
| energy | the ability to do work and accomplish change (kinetic and potential) |
| intensive | not dependent on amount (density and color) |
| extensive | dependent on amount (mass and volume) |
| element | on the periodic table |
| compound | distilled water |
| mixture | air |
| chemistry | the study of matter |
| properties | characteristics of matter |
| data | individual results of a single measurement |
| physical property | observed without changing composition or identity of a substance |
| physical change | a recognizable difference in appearance without changing composition |
| chemical property | result in a change in the composition and can be observed by a chemical reaction |
| chemical change | process in rearranging, removing, replacing, or adding atoms to produce a new substance |
| Celsius to Fahrenheit | F-32 / 1.8 |
| Fahrenheit to Celsius | 1.8 (C) + 32 |